import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.xml.sax.SAXException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.*;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.FileOutputStream;
import java.io.IOException;

public class demo3 {
    public static void main(String[] args) throws ParserConfigurationException, IOException, SAXException, TransformerException {
        DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder db=documentBuilderFactory.newDocumentBuilder();
        Document doc=db.parse("src/demo2.xml");
        Element brandElement=doc.createElement("Brand");
        brandElement.setAttribute("name","三星");
        Element typeElement=doc.createElement("Type");
        typeElement.setAttribute("name","NoteX");
        brandElement.appendChild(typeElement);
        Element phoneElement=(Element) doc.getElementsByTagName("PhoneInfo").item(0);
        phoneElement.appendChild(brandElement);
        TransformerFactory transformerFactory=TransformerFactory.newInstance();
        Transformer transformer=transformerFactory.newTransformer();
        DOMSource domSource=new DOMSource(doc);
        transformer.setOutputProperty(OutputKeys.ENCODING,"gb2312");
        StreamResult result=new StreamResult(new FileOutputStream("src/demo2.xml"));
        transformer.transform(domSource,result);
    }
}
